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<br />, <br /> <br />water treatment plant through EPCWlD facilities. Water from the medium and deep aquifers is <br />piped directly to the City's distribution system. <br /> <br />EI Paso Vallev <br /> <br />Below the Pass, the Rio Grande is the boundary between the Republic of Mexico on the <br />west and south and Texas on the east and north. The EI Paso Valley begins here and extends <br />downstream a distance of about 90 miles to a gorge in an extension of the Quitman Mountains. <br />Elevations range from about 3,730 feet at the EI Paso gaging station described below to about <br />3,450 feet at Fort Quitman. The EI Paso Valley varies in width from about 4 to 6 miles for much <br />of its length. On the Texas side, it includes approximately 40,000 irrigated acres in the EPCWID <br />in EI Paso County and 15,000 to 17,000 irrigated areas in the HCCRD in Hudspeth County. On <br />the Mexican side, it is referred to as the Juarez Valley. The Rio Grande has been channelized <br />through the EI Paso and Juarez Valleys and the channel is concrete lined through a good share <br />of its length. <br /> <br />Table 2-6 summarizes the flow records for Rio Grande at EI Paso during 1889-1995. <br />This gaging station is operated by the IBWC and is located on the Rio Grande at the <br />Courchesne BridgesJ, about 2 miles upstream from the point where the Rio Grande becomes the <br />international boundary and, therefore, registers the Rio Grande inflow to the EI Paso Valley. <br />The Rio Grande drains an area of about 29,300 square miles here. As shown in the Table 2-6, <br />the flow averaged 553,601 acre-feet annually and ranged from 50,747 acre-feet in 1902 to <br />2,011,617 acre-feet in 1905. <br /> <br />Currently, three diversion dams are operated on the Rio Grande in the EI Paso Valley. <br />(See Plate 3 and Figure 2-4.) In downstream order, these are the American Diversion Dam, <br />which supplies the American and Franklin Canals; the International Dam, which supplies the <br />Acequia Madre on the Mexican side; and the Riverside Diversion Dam, which supplies the <br /> <br />5J Since 1939, the records for the gaging station have been based in large part on the measured nows in <br />the river below the American Diversion Dam (1 .7 miles downstream from the Courchesne Bridge land the <br />measured diversions into the American Canal with only relatively high nows being determined from <br />measurements allhe Courchesne Bridge. <br /> <br />CO CJJ <br /> <br />2 -14 <br /> <br />"-':,',' <br />